Journal
CHINESE JOURNAL OF CATALYSIS
Volume 41, Issue 10, Pages 1474-1479Publisher
ELSEVIER
DOI: 10.1016/S1872-2067(20)63582-3
Keywords
Carbon-halogen bond activation; Photocatalysis; Halogenated organic pollutants; Reductive dehalogenation; Environmental remediation
Funding
- National Key R&D Program of China [2018YFA0209302]
- National Natural Science Foundation of China [21590811, 21677148, 21827809, 21922609]
- Key Research Program of Frontier Sciences of the Chinese Academy of Sciences [QYZDY-SSW-SLH028]
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A straightforward protocol using readily available aromatic amines, N,N,N',N'-tetramethylp-phenylenediamine or N,N,N',N'-tetramethylbenzidine, as photocatalysts was developed for the efficient hydrodehalogenation of organic halides, such as 4'-bromoacetophenone, polyfluoroarenes, cholorobenzene, and 2,2',4,4'-tetrabromodiphenyl ether(a resistant and persistent organic pollutant). The strongly reducing singlet excited states of the amines enabled diffusion-controlled dissociative electron transfer to effectively cleave carbon-halogen bonds, followed by radical hydrogenation. Diisopropylethylamine served as the terminal electron/proton donor and regenerated the amine sensitizers. (c) 2020, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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